There are many altcoins that could become explode in this year. However, it is impossible for anyone to forecast what will take place down the road. But I think a critical thinking will help to succeed in picking the correct altcoin. For me, I suggest NEO. It is a potential coin that operates a unique blockchain of its own while its target is to support an intelligent economy by making use of digital identity technology. It likewise supports the digitization of assets and allows for smart contracts, similar to ETH.